ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Decommissioning & Environmental Sciences
The mission of the Decommissioning and Environmental Sciences (DES) Division is to promote the development and use of those skills and technologies associated with the use of nuclear energy and the optimal management and stewardship of the environment, sustainable development, decommissioning, remediation, reutilization, and long-term surveillance and maintenance of nuclear-related installations, and sites. The target audience for this effort is the membership of the Division, the Society, and the public at large.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
Latest Magazine Issues
May 2024
Jan 2024
Latest Journal Issues
Nuclear Science and Engineering
June 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Bipartisan Fusion Energy Act pushes for regulatory clarity
Padilla
Sen. Alex Padilla (D., Calif.) introduced the Fusion Energy Act (S. 4151) last month with a bipartisan group of cosponsors—John Cornyn (R., Texas), Cory Booker (D., N.J.), Todd Young (R., Ind.), and Patty Murray (D., Wash.). The legislation would codify the Nuclear Regulatory Commission’s regulatory authority over commercial fusion energy systems to streamline the creation of clear federal regulations that will support the development of commercial fusion power plants—and would require a report within one year on a study of risk- and performance-based, design-specific licensing frameworks for “mass-manufactured fusion machines.
“Congress must do everything in its power to ensure continued U.S. leadership in developing commercial fusion energy facilities,” said Padilla as he introduced the bill. “The Fusion Energy Act would provide regulatory certainty for investors as the NRC develops and streamlines frameworks for such facilities.”
W. S. Yeung, Jen Wu, R. T. Fernandez, R. K. Sundaram
Nuclear Technology | Volume 101 | Number 2 | February 1993 | Pages 244-251
Technical Note | Heat Transfer and Fluid Flow | doi.org/10.13182/NT93-A34786
Articles are hosted by Taylor and Francis Online.
The results of the transient behavior of the water cannon phenomenon determined by RELAP5/MOD3 Version 5m5 are presented. The physical system consists of a 0.7112-m-long, 0.0381-m-i.d. vertical tube partially immersed in a reservoir of subcooled water. The tube is closed at the top and initially filled with saturated steam. The water cannon is created when a liquid slug is drawn into the tube because of the rapid condensation of the steam. In a fraction of a second, the liquid slug strikes the top end of the tube and causes a large pressure spike. The primary objective is to apply the RELAP5/MOD3 computer code to analyze the water cannon event and assess the ability of RELAP5/MOD3 to simulate fast two-phase transients. The sensitivity of time-step size and mesh size has been studied. It is found that RELAP5/MOD3 adequately simulated the transient process with a mesh size of 0.07112 m (i.e., ten nodes) and a time-step size of 10−5 s. The calculated peak pressure of the first pressure spike is of the same order of magnitude as experimental data from literature. The effect of reservoir temperature on the magnitude of the first pressure spike is also studied, and it is found that the pressure peak value decreased with increasing reservoir temperature.